In a statement, USA Basketball director Jerry Colangelo said that Durant's withdrawal was due to mental and physical exhaustion, and was not related to the traumatic leg injury Pacers forward Paul George suffered during the team's intra-squad scrimmage a week ago.

The U.S. team has an exhibition game against Brazil scheduled for Aug. 16 at the United Center in Chicago. The World Cup, held in Barcelona, begins on Aug. 30. Teams must submit their final rosters by Aug. 29.